| Title: | Emissions of Ammonia and Other Nitrogen-Containing Volatile Organic Compounds from Motor Vehicles under Low-Speed Driving Conditions |
| Author(s): | Yang D; Zhu S; Ma Y; Zhou L; Zheng F; Wang L; Jiang J; Zheng J; |
| Address: | "School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China. NUIST Reading Academy, Nanjing University of Information Science & Technology, Nanjing 210044, China. Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Emissions of NH(3) and nine nitrogen-containing volatile organic compounds (NVOCs) (C(1-3)-amines, C(1-3)-amides, and C(1-3)-imines) from motor vehicles powered by gasoline, diesel, and natural gas under low-speed driving conditions from roadside in situ measurements were characterized using a water-cluster chemical ionization mass spectrometer and trace gas monitors. The total emission strength of diesel trucks was the greatest followed by those of gasoline cars and natural gas cars. NH(3) emission per vehicle was found to be 2-3 orders of magnitude greater than that of all NVOCs, regardless of the type of vehicle. Although much lower than the emissions of amides or imines, emissions of amines were sufficient to produce atmospheric concentrations exceeding the threshold level for amines to enhance atmospheric nucleation by several orders of magnitude. Different engine emission reduction technologies (e.g., three-way catalytic converter vs selective catalytic reduction) can lead to different NH(3) and NVOC emission profiles. During the lifetime of a vehicle, its emission level was most likely to increase with its mileage. Source profiles of NH(3) and NVOC emissions from the three types of vehicles were also obtained from the measurements. These profiles can be a valuable contribution to the air pollution management system in terms of source apportionment, elucidating the emission contributions from a specific type of vehicle" |
| Keywords: | *Air Pollutants/analysis Amides Amines Ammonia Environmental Monitoring Gasoline Imines Motor Vehicles Natural Gas Nitrogen Vehicle Emissions/analysis *Volatile Organic Compounds chemical ionization mass spectrometry gas-particle partitioning source appor; |
| Notes: | "MedlineYang, Dongsen Zhu, Shengnan Ma, Yan Zhou, Liujun Zheng, Feixue Wang, Lin Jiang, Jingkun Zheng, Jun eng Research Support, Non-U.S. Gov't 2022/04/12 Environ Sci Technol. 2022 May 3; 56(9):5440-5447. doi: 10.1021/acs.est.2c00555. Epub 2022 Apr 11" |
